My Diglett Theory

Maybe Diglett exists in a state of
amorphous, similar to Ditto, but must keep part of
its body underground to maintain posture while
the upper part of its body stays in solid form. This
would explain why Diglett is able to adapt to so
many , including water. it even
accounts for that popular picture of it sitting on a
chair. Suppose the bottom part of its body is
actually buried inside the seat of the chair, but
thanks to its amorphis property, it can flatten that
part of itself so that it doesn' t stick out the bottom.